Project Outline
Effects of Transient flow on the vehicle Aerodynamics
Submitted by:
Ughishipram Rajendran
110055788
On
15th March 2022
For
Winter 2022
Wind Engineering
Introduction
Aerodynamics has a significant impact on fuel consumption and, as a result,
emissions at higher speeds. The boundary conditions are idealised in the wind
tunnel or in a computational flow simulation since flow fields surrounding a
vehicle are transitory in real life.
As the price of fuel grows, automakers are becoming increasingly concerned
about building fuel-efficient vehicles. Because different manufacturers'
designers came to the same findings based on independent study, modern cars
have a lot in common in terms of design. It's now widely acknowledged that
certain designs and features produce the best aerodynamics, which is one reason
why so many modern cars appear alike.
Aerodynamic efficiency is one feature of automotive design that ensures that a
car encounters minimal resistance from the air it moves through. The less fuel
it takes to go at any given speed, the more aerodynamically efficient it is. The
lower the air resistance, the more crucial it is to keep the car moving quickly.
Objective
 Reduction of fuel consumption
 More favourable comfort characteristics
 Improvement of driving characteristics
Overview
At higher speeds, aerodynamics have a major influence on fuel consumption
and thus emissions. Flow fields around a vehicle are transient in real operation;
in the wind tunnel or in a computational flow simulation, the boundary
conditions are idealized.
Since purchase decisions are increasingly dependent on consumption and
emissions due to the environmental awareness buyers are expected to have, it is
necessary to be able to estimate these as realistically as possible during the
development process in order to find approaches for optimization. Today’s
development tools in vehicle aerodynamics – the wind tunnel and
computational flow simulation – idealize flow around the vehicle that is easily
reproducible.
These various parameters and tools will be used to study in detail about the
effect of transient winds in a more detailed manner